Sterling at 2-month lows as dollar and Brexit weigh

* Graphic: World FX rates in 2019 http://tmsnrt.rs/2egbfVh

* Graphic: Trade-weighted sterling since Brexit vote http://tmsnrt.rs/2hwV9Hv

LONDON, April 24 (Reuters) - The pound held at a two-month low on Wednesday, weighed down by a broad-based rally in the dollar and fading hopes of a breakthrough in Brexit talks between the British government and the opposition.

The dollar index, which measures the U.S. currency versus a basket of six major rivals, hit a 22-month high overnight.

British Prime Minister Theresa May told her top team of ministers on Tuesday that talks with the opposition Labour Party aimed at finding a way forward on Brexit were serious but difficult in some areas.

The pound edged 0.1 percent lower at $1.2920, its lowest level since Feb. 19. Against the euro, the pound was broadly steady at 86.76 pence.

Some analysts saw some reason for optimism, given that a deal with the EU to delay Brexit until at least October had removed the imminent risk of Britain leaving the bloc without a deal.

"We are quite constructive about the outlook for the pound in the short term as a hard no-deal Brexit has been completely removed with the pound's relative undervaluation becoming an attractive proposition," said Nikolay Markov, a senior economist at Pictet Asset Management in London.

Data last week showed speculative net positions in the pound turned slightly in favor of holding long sterling positions for the first time since June 2018, according to data published by the US Commodity Futures Trading Commission.

Recent data has also been supportive for the pound. Data last week showed retail sales volumes surged by the most in nearly two-and-a-half years in annual terms, way above market expectations. (Reporting by Saikat Chatterjee; Editing by)